cd.cpp:7: ISO C++ forbids declaration of `freopen' with no type cd.cpp:7: `int freopen' redeclared as different kind of symbol /usr/include/stdio.h:226: previous declaration of `FILE* freopen(const char*, const char*, FILE*)' cd.cpp:7: initializer list being treated as compound expression cd.cpp:7: invalid conversion from `_IO_FILE*' to `int' cd.cpp:8: ISO C++ forbids declaration of `freopen' with no type cd.cpp:8: redefinition of `int freopen' cd.cpp:7: `int freopen' previously defined here cd.cpp:8: initializer list being treated as compound expression cd.cpp:8: invalid conversion from `_IO_FILE*' to `int'